Insulator.



H. R. MARKEL.

INSULATOR.

APPLICATION FILED DEc.26. I9I3.

1,201 ,325 Patented Oat. 17, 1916.V

UNITED STATES PATENT OFFICE.

HARLEY R. MARKEL, OF COLUMBUS, OHIO.

INSULATOR.

Application led December 26, 1913.

To all whom t may conce/ra Be it known that I, HARLEY It. MARKEL, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Cfhio, have invented certain new and useful Improvements in Insulators, of which the following is a specification.

My invention relates to insulators of the type used primarily in wiring a building and adapted to support a wire a predetermined distance from an attaching wall.

To this end my invention aims to provide a simple and practical construction of insulator overcoming, to a marked degree, the frailty usually found in a porcelain ware of this type. Also, I aim to provide a structure whereby the various sections comprising the insulator, as a whole, will be firmly held in their set position. In carrying forth this idea, I have also endeavored to present a structure such that the various sections may. be suitably supported while undergoing the glazing' process, these supporting surfaces being so arranged that those surfaces normally exposed to view when the insulator is in its position, will not be marred.

@ther objects of my invention will be more apparent after a further detailed description of the accompanying' drawings, in which similar characters of reference designate corresponding parts and in which:

Figure l is a longitudinal vertical section of an insulator embodying the principles of my invention, FiO. 2 is a side elevation of the structure shown in Fig. l, Fig. 3 is an elevation of the structure shown in Fig'. 2 but taken at right angles thereto, Fig. 4: is a transverse vertical section of my insulator, Fig. 5 is a view in perspective of one of the members comprising my insulator, Fig. i is a view in perspective of the coperating member used in connection with the structure shown in Fig. 5, and, Fig. 7 is a view in perspective of my assembled insulator'.

In carrying forth my invention, I have provided what is known as a two-part insulator, these parts being designated by the numerals l and 2. Both the members l and 2 are centrally bored longitudinally, as shown at 3 and la these bores being adapted to register to form an easy means of attachment with an attaching screw. The upper and lower walls may be countersunk, as shown at 5, or counterbored as shown at 6, as may be desired, these features not being a part of the present invention.

Specicaton of Letters Patent.

Patented Oct. 17, 1916.

Serial No. 808,869.

In order to comply with the various laws regulating the mounting of conducting wires, I have provided the present insulator with one wire receiving groove only, this groove being formed by the coperation of the groove 7 formed in the member 2 and a coinciding groove 8 formed in the member l. As will be seen by reference to the drawings, these grooves are disposed along one edge of the insulator and considerably to one side of the longitudinal bores. In order that the two members may be securely held in their assembled positions, I have provided the upper member 2 with two spaced lugs 9 and l0, these lugs ,being at substantially right angles to the groove 7 and extending across the body7 portion of the member 2 its entire width. Coperating with the spaced lugs 9 and l0, there is provided an upstanding centrally disposed lug ll, also substantially at right angles to the groove 8. This last mentioned lug is adapted to neatly lit the space between the lugs 9 and 10 and each of the lugs 9, l0 and 1l is provided with a planefaced end wall as is indicated at l2. Further, the lower member of one or both may also be provided with small projecting knobs as shown at 13. During the glazing process, the lower member may rest upon these knobs permitting the entire surface of the remainder to be glazed, or it may rest on the end wall 12 of the lug 11 supplemented by the edges of the groove S while the upper member may rest upon the end walls of the lugs 9 and l0, thereby marring only the sur-A faces hidden from view after the in their assembled condition.

In order to guard against any possible contact of the conducting wire with the attaching screw, I have provided the upper member 2 with an upwardly extending shoulder, as shown at 14, this shoulder being centrally disposed with relation to the longitudinal bore 3 and occupying a portion of the spacing between the spaced lugs 9 and 10. The lower member l is complementally formed to receive this shoulder, in that a socket is provided by cutting away a portion of the upstanding lug 1l, as shown at 15. Therefore, when the two parts are in their assembled condition, the shoulder lll will project upwardly a slight distance to guard against all possible contact of the. conducting wire with the metallic attaching screw.

From the above description, taken in conparts are IIJ nection with the accompanying drmvings, it will be apparent that I have provided a coi'nparatively simple structure or' insulator and one that will withstand the abuses heaped upon this ware during shipment. Ordinarily, the weakest point of an. insulater is from the wire receiving groove on a diagonal line to the top wall where this wall is braced it'or the attaching screw. Also, all projecting formations are frequently broken. By disposing the'wire receiving` groove to one side, as shown, the projecting shoulder 14 O'ives added strength to this part to prevent cracking as well as preventing engagement of the conducting wire with the attaching screw. Also, by this structure, all projecting lugs may be made suiiiciently heavy to guard against all breakage.

lVhat I claim, is:

l. A two part insulator comprising complemental members adapted for superimposition, said members being longitudinally bored for an attaching screw and each provided 'with a wire receiving groove, a lug on one of said members having a plane faced portion on a level with at least one edge portion of the groove in the same member, said lug extending laterally in a direction substantially at rignt angles to its groove across said member the remainder of its width, and a complemental lug having a plane faced portion on the other of said complemental members substantially at right angles to its wire groove and continuing from said last named groove across said member its full width.

2. A two part insulator comprising complemental vmembers adapted for superimposition, said members being longitudinally bored for an attaching screw and each pro- Gopies of this Leonesa vided with a wire receiving groove7 a 'lug on one of said members having a plane faced portion on a level with at least one edge portion or the groove in the same member7 said lug extending laterally in a direction substantially at right angles to its groove across said member the remainder of its width, spaced lugs on the other or' said members arranged to straddle said iirst named lug, said spaced lugs having fiat ends and being disposed substantially at right angles to the wire groove in said last named member and extending from its groove across the remainder of the width of said member.

3. A two part insulator comprising compleinental members adapted for superimposition, said members being longitudinally bored for an attaching screw and being each provided with a single wire receiving groove disposed to one side of said bores, spaced lugs having plane-faced ends on one of said members substantially at right angles to its wire groove and extending across the body portion of the member the remainder of its width7 a projecting shoulder in the space between said lugs through which the longitudinal bore is adapted to pass, and a complemental lug on the other member disposed substantially at right angles to its wire groove and extending from the groove across the body portion of the member the remainder of its widtln said last named lug being adapted to fit the space between said first named lugs and being also provided with a socket to receive said shoulder on the other member.

.In testimony whereof I affix my signature in presence of a witness.

HARLEY R. MARKEL. Witness:

VALTER EJL. BooK.

patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

Washington. D. C. 

